refactoring various pieces of the framework.

laravel/security/crypter.php

@@ -72,25 +72,29 @@ class Crypter {
 	 */
 	public static function decrypt($value)
 	{
-		// Since all encrypted strings generated by this class are base64
-		// encoded, we will first attempt to base64 decode the string.
-		// If we can't do it, we'll bail out.
 		if ( ! is_string($value = base64_decode($value, true)))
 		{
 			throw new \Exception('Decryption error. Input value is not valid base64 data.');
 		}
 
-		// Extract the input vector and the encrypted string from the value.
-		// These will be used by Mcrypt to properly decrypt the value.
-		$iv = substr($value, 0, static::iv_size());
-
-		$value = substr($value, static::iv_size());
+		list($iv, $value) = static::parse($value);
 
 		$key = Config::$items['application']['key'];
 
 		return rtrim(mcrypt_decrypt(static::$cipher, $key, $value, static::$mode, $iv), "\0");
 	}
 
+	/**
+	 * Parse an encrypted value into the input vector and the actual value.
+	 *
+	 * @param  string  $value
+	 * @return array
+	 */
+	protected static function parse($value)
+	{
+		return array(substr($value, 0, static::iv_size()), substr($value, static::iv_size()));
+	}
+
 	/**
 	 * Get the input vector size for the cipher and mode.
 	 *